INT 21 - OS/286, OS/386 - ISSUE REAL PROCEDURE CALL
AH = E1h
???
Return: ???
Note:   protected mode only???
SeeAlso: AH=E2h"OS/286",AH=E3h"OS/286",AX=250Eh,INT 31/AX=0301h

See also: 21E0

21E1 - OS/286, OS/386 - ISSUE REAL PROCEDURE CALL